Iodotropheus declivitas, new species, is described from Boadzulu Island, Lake Malawi.
Iodotropheus sprengerae, the type species of Iodotropheus, was based solely on
aquarium-raised specimens thought to have originated from broodstock collected from Boadzulu
Island. Subsequently, I. stuartgranti was described from the eastern shore of Lake
Malawi near the Mozambique border. Analysis of the morphometric and meristic data, however,
demonstrate [sic] that the type series of I. sprengerae is phenotypically more similar
to wild-caught specimens from Chinyankwazi and Chinyamwezi islands than it is to wild-caught
specimens from Boadzulu Island. The new species is distinguishable from the type series of
I. sprengerae, wild-caught specimens from Chinyankwazi and Chinyamwezi islands, and
from the type series of I. stuartgranti based on shape, oral dentition, and pharyngeal-bone
dentition.